Piston-ring.



J. P. HIGLE'Y.

PISTON RING.` v APPucmoN man [550.3. 1914.

Patnted Nov. 23, 1915.

' mating faces of tli'e said piston ring piarrnnj siiinrns rarnnrr opinen..

JOHN P. HIGIiEY, F ST. LOUIS, MISSOURI, '-ASSIGNOR- 0F ONE-FOURTH TO JOSEPH' RUGGABER AND ONE-renen To r. ivi.

ANDERSON, BQTH 0F ST. LOUIS, MISSOURI.

eIsron-RING.

Specification of Letters Patent.

irritantes. ivo-v. as, isis.

Application legi December 3, 1914. Serial No. 875,249.

T 0 all whom it may coince/m: f

lle it known that I, JOHN PJHIGLEY, a

citizen of the United States, and resident of y St. Louis, Missouri, have inventedeertain new and useful Improvements in Piston- Rings,

tion containing a scription, reference panying drawings,

full, clear, and exact debeing lhad to the accomfoiininga part hereof.

Myvinvention relates to an improved piston ring, and consists in the novel construetion hereinafter described and pointed out i in the" appended claim.

The object of thereto; Fig. 2 is a vertical section of the saine; Fig. 3 is a plan view of a rabbeted ring in making up a pair of rings; Fig. 4: is a view ofl the opposite rabbeted ring of the pair; Fig. 5`is a detail lseetion taken on the line 5-5 of -F ig. 2; and Fig. (i is a detail view of a portion of'the'rings forming the pair separated.

Referring by -fnurnerals to the aecompanyingdrawin'gsz 1 indicates a common gaso;

lene engine 'cylinder within'whieh is the usual piston 2 having the usual, eoniinon ring grooves 3,.'vvithin which are locateda pair of mating rings 4l and 5,`respectively, plaeedjs'ide by side in said groove andeon# nected by an annulartongue G formed upon the inner face of the ring' 4 and aeorrespending annular groove 7 formed in the The saidgtongue 5 is niueh diainetrieally-smaller than said groove 7, and fits loosely in the said groove,lso thattliere is an annular oilspace on the outside and inside of .said

tongue, and each of the rings l and 5 will befree to expand and contract independently of each other. The said rings l and 5 have the usual oblique overlapping ends` and are formed. so that they ,have a` tendency to spring open and yieldingly press against the inner wall of the said cylinder 1. The overlapping oblique ends of the said rings 4 and of which thefollovving is a specilieamy invention is to provide Y au improved piston ring especially adapted are set so as toy break joints and prevent leakage. rlhey are lieldin'fixed relation to each other by a radialpin -8 project-ing laterally frein-the inner periphery of the said tongue 6 at a`'point preferably diametrically opposite its oblique ends, and this pin when the rings are in the' piston, sets ina recess -9 formed partly in-'eaeh of the opposingends of the vinner wall of the said groove T ofy said grooved ring 5, at the joint between the oblique ends --of clearly in Fig. course operate in the usual manner, but the tongue 6 and the groove 7 operate to prevent leakage past the rings. Said groove 'T dursaid ring, as shown more ing use becoming iilled vwith oil. makes avery tiglit joint with the lsaid tongue. -Furthei'more, should either of the rings 4- or 5 be broken during use, the aid tongue and 4. The rings stando of groove connection will eieetually hold together the brokeiiparts.

` I elaiin. y 4 r -An improved piston-ring, composed of two rings having like diameter and provided with the usual'overlapping oblique ends and placed side by side, one of said rings having an annular'tongue projecting laterally from its inner face, and. the companion ring haviing an annular groove formed in its inner face, the said tongue being smaller in crosssection and of less -dia'ineter than said groove, so that said tongue will tit loosely Within said groove and for-in an annular oilreceiving space on both the outside and inner side of the said tongue, whereby said oil-space will become illed with oil when the Arings arexin use, and vet permit both rings to, freely expand and contract inde-v pendently, and a pin yfixed in said tonguev and lprojecting laterally from its inner peripheryinto a recess foi-med partly' in each of. the opposing ends of the inner wall of the said groove, at the oblique joint between said ends.

In testimony whereof, I have signed un" naine to this specification, in presence of 

